diff --git a/HISTORY.md b/HISTORY.md
index fca89b2d..56d080eb 100755
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -56,6 +56,9 @@
 * **Translation Updates:**
     * German
 
+### 2022-07-01
+* extensions: added a slash-suffix to the EDC url allow-list entry 
+
 ### 2022-06-30
 * MQTT extension update, thanks, Simon and Xavier!
 
diff --git a/snap.html b/snap.html
index 3bf9d939..62fa6413 100755
--- a/snap.html
+++ b/snap.html
@@ -28,7 +28,7 @@
         <script src="src/sketch.js?version=2021-11-03"></script>
         <script src="src/video.js?version=2019-06-27"></script>
         <script src="src/maps.js?version=2021-06-15"></script>
-        <script src="src/extensions.js?version=2022-06-29"></script>
+        <script src="src/extensions.js?version=2022-07-01"></script>
         <script src="src/xml.js?version=2021-07-05"></script>
         <script src="src/store.js?version=2022-04-26"></script>
         <script src="src/locale.js?version=2022-06-28"></script>
diff --git a/src/extensions.js b/src/extensions.js
index 217833f0..52d21144 100644
--- a/src/extensions.js
+++ b/src/extensions.js
@@ -34,7 +34,7 @@ SVG_Costume, newCanvas, WatcherMorph*/
 
 /*jshint esversion: 11, bitwise: false*/
 
-modules.extensions = '2022-June-29';
+modules.extensions = '2022-July-01';
 
 // Global stuff
 
@@ -46,7 +46,7 @@ var SnapExtensions = {
         'libraries/',
         'https://snap.berkeley.edu/',
         'https://ecraft2learn.github.io/ai/', // Uni-Oxford, Ken Kahn
-        'https://microworld.edc.org' // EDC, E. Paul Goldenberg
+        'https://microworld.edc.org/' // EDC, E. Paul Goldenberg
     ]
 };